/Engine/Source/Runtime/Slate/Public/Framework/MultiBox/MultiBox.h
Creates a new multibox instance
static [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FMultiBox](API\Runtime\Slate\Framework\MultiBox\FMultiBox) > Create ( const EMultiBoxType InType, [FMultiBoxCustomization](API\Runtime\Slate\Framework\MultiBox\FMultiBoxCustomization) InCustomization, const bool bInShouldCloseWindowAfterMenuSelection )